<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>效果展示</title>
    <style>
      body {
        background-color: #2c3e50;
        padding: 30px;
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
      }
      a {
        padding: 30px 20px;
        text-decoration: none;
        background-color: #f1c40f;
        color: #2c3e50;
        text-align: center;
        border-radius: 10px;
        font-size: 30px;
        font-weight: bold;
      }
      a:hover {
        transition-duration: 0.3s;
        background-color: #16a085;
        color: #fff;
      }
    </style>
  </head>
  <body>
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  </body>
</html>
